﻿#region Copyright

// // The contents of this file are subject to the Mozilla Public License
// // Version 1.1 (the "License"); you may not use this file except in compliance
// // with the License. You may obtain a copy of the License at
// //   
// // http://www.mozilla.org/MPL/
// //   
// // Software distributed under the License is distributed on an "AS IS"
// // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// // License for the specific language governing rights and limitations under 
// // the License.
// //   
// // The Initial Developer of the Original Code is Robert Smyth.
// // Portions created by Robert Smyth are Copyright (C) 2008-2013.
// //   
// // All Rights Reserved.

#endregion

using NoeticTools.NWorkflow.Exceptions;


namespace NoeticTools.NWorkflow.ProgressMonitoring
{
    internal class NullProgressScope : IProgressScope
    {
        public double Completed
        {
            get { throw new WorkflowProgressConfigurationException("Progress data has not been configured for this workflow."); }
        }

        public void Dispose()
        {
            throw new WorkflowProgressConfigurationException();
        }

        public string Name
        {
            get { return "_Null"; }
        }

        public IProgressScope Parent { get; private set; }
        public double TotalCompleted { get { return 0.0; } }

        public void Enter(IProgressScope childScope)
        {
            throw new WorkflowProgressConfigurationException();
        }

        public void AddStep(IStepRules stepRules)
        {
            throw new WorkflowProgressConfigurationException();
        }

        public double UpdateWeights(double startingWeight)
        {
            return 0.0;
        }
    }
}